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A. G. KOECHLIN.

WEI-T SPOOL CHANGER FOB WEAVING LOOMS. APPLICATION FILED SEPT- 11. I919.

1,321,31 5. Patented Nov. 11,1919. Z5 2 I 4fforn e UNITED STATES PATENT, ornion ALBERT GEORG KOECHLIN, or BASEL, swI'rzEnLAnn, I

wnr'r sroor. CHANGER FOR wEAvmG-LooMs.

Specification of Letters Patent. I Patented Now, 11, 1919.

Application=fild september 11, 1919. Serial N0. 323,167.

To all whom timely-concern:

Be it known that I, ALBEmr'GEoRe Koren- LIN, a citizen of the -'Sw1ssRepubl1c, and residentof Basel, Switzerland, factory director,

the pusher or transferrer, mounted on the lay, is always in cooperative relationship with an arm adapted-to depress it for introducing the spool into the shuttle, and wherein the mechanism for operating this arm is so arranged that'the pusher may be depressed for introducing afresh spool, not only, as previously, before the dead point position of'the lay, but also inany later position up to the moment when the throw of the shuttle begins.

W'ith this arrangement it may happen that the new weft spool is not in correct position for operation of the pusher, in which event the pusher, its driving mechanism or some other part of the loom may be'damaged.

The present invention relates to an improvement to the weft spool changer of *the above kind, whereby this disadvantage is avoided. For this purpose, the mechanism for operating the pusher comprises an arm made int-W0 parts coupled together by a yielding coupling, so that, normally, the arm depresses the pusher for introducing a new weft spool, but when an obstruction occurs the coupling yields and damage by thrust upon the pusher is avoided.

The accompanying drawing illustrates the invention.

Figure 1 is a side elevation, similar to Fig. 1 of the aforesaid specification.

Fig. 1 shows a detail of Fig. 1;

Fig. 2- is a side elevation and Fig. 3 an end elevation of the arm operating the pusher;

Fig. a is a partial section on line AB of s in the construction described 1n the aforesaid specification, a weft thread control determines the change of weft spool when there is failure of the weft thread. When this happens the weft control fork 5 is en gaged in the known manner by the osclllating lever 7 (Fig. 1) and the latter pushes 1n its outward path the rod 2 against a spring (not shown) and-acts through this rod on a lever arm 8 fixed to the usual'spool changing control shaft 13, thereby starting the operationof the change mechanism on the other side of the loom. e

' The turning movement of shaft 13, caused by the thrust of rod 2, is transformed on the other side of the loom, by means of an arm 14 on the shaft-13, into rectilinear movement of a toothed rod 1 1, which through apinion 15 and an arm 16 connected with a crank pin on the p1n1on,- moves a lever 17 and thus engages the movablesleeve 1S of'a clutch 19 on 1 the bearing pin 21 (F ig. 1). The sleeve 18 carries'an ar1n 22 on which is a roller 23 for cooperation with a cam disk at but normally out of the path of the cam 31 thereof. The counter part 20 of the clutch 19 has an arm 25 which extends-over an adjustable crossh'ead 26 (Fig. 1) on the pusher 27. The latter movesto and fro in space with the lay 28,'in the top part 29 of which it is mounted,

to slide up and down, being normally held up by springs 30. It moves with the lay, unhindered by the arm 25. lV-h'en, however, the clutch 18-20 is engaged, the roller 23 comes into the path of 'the'cam 31v of the disk 24: and is raised so as to depress the arm 25 and therefore the pusher 27 whicheXpels from the free end of an inclined channel-like spool magazine a loaded spool into the shuttle, the latter having in the meantime arrived beneath the pusher. The cam disk 24: and the parts cooperating therewith are so arranged that the introduction of a new spool occurs during a period of time within which the driving shaft of the lay (crank shaft) makes a quarter revolution and that the dethe lay, but also at this position and after it,

up to the beginning of the shuttle throw.-

According to the present invention, the

arm 25 for operating the pusher is made in two parts (Figs. 2-1) connected together by a flexible coupling. The latter comprises two disks 4-0, ll, of which one is rigidly connected with one part of the arm 25 and the other with the other part. One of the disks carries two conveX nipples l2 adapted to engage in two cavities on the other disk, the engagement being maintained by a spring 43 urging the two disks together. 1

Normally the arm 25 can operate the pusher to introduce a new weft spool, since the coupling lends the arm suflicient rigidity for the purpose. If, however, there is an obstruction to the pusher owing to incorrect feed of spools, the coupling 40, 41 yields and the arm 25 bends, damage being thus avoided.

Any other suitable coupling for the parts of the arm may be substituted for that described.

What I claim is:

1. In an automatic weft replenishing loom, an oscillating lay, a shuttle arrangement, a pusher for introducing a full weft spool into the empty shuttle, said pusher being movable with the lay and further capable of up and down movement rela tively to the lay, a two-part actuating arm adapted by one of its parts to depress the pusher for a weft spool changing opera' tion and to remain during the travel of the pusher in cooperative relationship there with, a yielding coupling yieldingly connecting the two parts of said actuating arm, an independent device for automatically operating the said actuating arm on its other part, and weft failure detecting means to set said operating device into operation when the weft fails, substantially as and for the purpose described.

2. In an automatic weft replenishing loom, an oscillating lay, a shuttle arrange ment, a pusher for introducing a full weft spool into the empty shuttle, said usher being movable with the lay and further capable of up and down movement relatively to the lay, a twopart actuating arm adapted by one of its parts to depress the pusher for a weft spool changing operation and to remain during, the travel of the pusher in cooperative relationship therewith, a yielding coupling yieldingly connecting the two parts of said actuating arm, an independent device for automatically operating the said actuating arm on its other part, and weft failure detecting means to set said operating device into operation when the weft fails, said yielding coupling comprising two disks rigidly connected with the parts of the said actuating arm respectively and engaged with each other under spring action by means of convex nipples and concave cavities, substantially as and for the purpose described.

In witness whereof I have hereunto signed my name this 22nd day of August 1919, in the presence of two subscribing witnesses.

ALBERT GEORG KOECHLIN.

lVitnesses Scorr TAGGART, AMAND BRAUN.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. G. 

